Expect for everything to go wrong. Which is why I’m not one to advocate planning everything about your trip to a T.
Traveling, like life, is prone to massive cock-ups. Planes get delayed, bags get lost, buses run late. I try to expect Murphy’s Law to come in and mess with my holiday. The best thing to do? Roll with the punches and remember that you’re lucky enough to be traveling in another city (maybe even country) and that life is beautiful. Cock-ups and all.
Just breathe, realize it’s not life or death and go out an enjoy yourself.